Insulating-clamp.



PATENTED MAR. 26, 1907.

T. B. LEE. INSULATING CLAMP.

APPLIOATION FILED MAY 16, 1906.

L N MB M m Arm/mere THOMAS B. LEE, OF CHARLOTTE, NORTH CAROLINA...

INSULATENG GLAMPQ Specification of Letters Patent.

Patented March as, rent.

Application filed May 15, 1906. Serial No, 316,905.

zen of the United States,-and a resident of Charlotte, in the county of Mecklenburg and State of North Carolina, have invented certain new and useful Improvements in Insulater-Clamps, of which the following is a specification.

Y, My invention relates to-improveme'nts in devices for clamping electric transmissionwires to insulators.

The main object of my invention is to improve upon the construction and efiiciency of such devices now in use, and to providea clamp upon which as much strain may be put as may be necessary to hold the wire from slipping and to give it such clamping effect as to throw a required amount of friction on the wire, and to allow for more or less slipping over the top 01"; the insulator.

With these and other objects in view my invention consists, broadly, of an insulatorclamp comprising two separate sections to embrace the insulator-neck and suitable means for clamping said sections together.

My invention consists, further, in certain novel features of construction, arrangement, and combination of parts as will be hereinafter fully described, and pointed out in the accompanying drawings, in which Figure 1 is a bOtIOIILPlBJl-VIGW of my improved clamp, showing transmission-wire in lace. Fig. 2 is a projection on line 2 2 of ig. 1. Fig. 3 is a section through the bushing'to be used on wire. Fig. 4 shows application'of my clamp to an insulator. I v

In carrying outmy invention I use two similar semicircular'sections or plates Aa of semicircular cross-section of such size as to slip on the neck of an insulator I, each semicircular section or plate having a lug A at each end projecting upwardly and having a semicircular groove 0;, the grooves of each section or plate at each end facin each other and forming an approximate y-i icireular groove jwithinwhich the wire W rests and is held. Below the grooves each lug has anopening a, through which are passed the bolts B, on the threaded ends of which are screwed the nuts 0.

' In Fig. 3 I have illustrated a bushing, said bushing consisting of upper and lower halves D D, so that when their longitudinal edges are brought together they form 'a-itubuar bushing which tapers inwardly from its ends to its center 11, 'at'which its diameter is the least. The outer edges of each half of the bushing is beveled, as shown, at d. The bushing is made from a difierentmetal than that of the clamp members in order to protect the wire from abrasionshould it. slip away.

\ In applying my improvement the twopart bushing is placed around the Wire and the bushings then laid, one on each side of the insulator, in the grooves of the two members of the clamp before its opposing faces are drawn closely together. The semicircular parts of the clamp members are now easily slipped into and around the groove oftlie insulator and the nuts C then screwed up on. the bolts, drawing the opposing faces of the clamp members toward each other and tightly clamping the wire and the members of the clamp on the neck of the insulator.

From the above it will be seen that I provide a" sim lo and inexpensive device and one which willuesist'a pull or lift of the .wire in any direction when-the clamp is tightly assembled around the insulator -neck and one in which in ordinary cases will prevent an movement of .thewire or clamp backwar forward, downward, or upward and will in cases of extreme tension permit the wire to slip through theclamp. to prevent breaking.

The nuts C on the bolts B may be prevented fromturning oil by some simple and suitable form of nut-lock. While I have shown boltsand nuts'for holding the sections of the clamp togetheryyet I may use any suitable means for this purpose. l

1. An insulator-clamp comprising two separate inflexible sections adapted to clamp a transmission-wire and engage the neck of an insulator, and means for securing said sections together.

2. An insulator-clamp comprising two separate semicircular inflexible sections adapted to clamp a transmission-wire and engage the neck of an insulator, and means for securing i said sections together on the insulator.

3. An insulator-clamp comprising two separate semicircular inflexible sectionsad apted to engage the neck of an insulator, l'ugs at the ends of said sections adapted to clamp a transmission-wire, and means for drawing said lugs together to clamp the wire and secure the clamp to the insulator.

4. An insulator-clamp comprising two separate semicircular infiexiblesections adapted to engage the neck of an insulator, vertical lugs at each end of each section, said lugs aving' semicircular grooves in their opposing faces to receive a transmission-wire, and means for drawing the opposing faces of said lugs togetherto clamp the wire and secure ing means pro ecting from said body portions,

and a bushing fitting in said wire-holding means and surrounding the wire.

7. The combination with an insulator, of a clamp comprising two separate body portions encircling said insulator, and wireholdin means projecting, therefrom, and a separa le bushing held by said wire-holding means and surrounding the wire.

8. The combination with an insulator, of a clamp comprising two separate body per-- tions encircling said insulator, and wireholding means projecting therefrom, a double-tapered bushing held by said wire-holding means and surrounding the wire.

9. The combination with an insulator, of a clamp comprising two separate body portions encircling said insulator, and wireholding means. projecting therefrom, a sep sections; having lugs holding mea'ns, a separable bushing held by said In s and surrounding the wire, and means 'or forcing the opposing faces of the L lugs toward each other.

11. The combination with an insulator, of a clamp comprising two separate semicircular projecting upwardly therefrom, said lugs consisting of wire-holding means, a bushing held by said bushingflaring toward each end f om its center, and means for forcing the opposing faces of the lugs toward. each other.

12. The combination with an'insulator, of a clamp comprising two separate semicircular sections having lugs projecting upwardly therefrom at each end, said lugs having grooves in their opposing faces, a separable bushing held in said grooves, and flaring tow-ardxeach end from its center, and means for forcing the opposing faces of the lugs toward each other.

THOMAS i3. LEE. Witnesses:

W. H. MARTIN, Jr., 0. A. MEYER,

lugs, said 

